Redo #652 (#658)

I messed up the merge somehow 🤦

Author: julienduchesne

docs/resources/rule_group.md

@@ -109,7 +109,7 @@ EOT
 
 ### Required
 
-- `folder_uid` (String) The UID of the group that the folder belongs to.
+- `folder_uid` (String) The UID of the folder that the group belongs to.
 - `interval_seconds` (Number) The interval, in seconds, at which all rules in the group are evaluated. If a group contains many rules, the rules are evaluated sequentially.
 - `name` (String) The name of the rule group.
 - `org_id` (Number) The ID of the org to which the group belongs.

grafana/resource_alerting_rule_group.go

@@ -42,7 +42,7 @@ Manages Grafana Alerting rule groups.
 				Type:        schema.TypeString,
 				Required:    true,
 				ForceNew:    true,
-				Description: "The UID of the group that the folder belongs to.",
+				Description: "The UID of the folder that the group belongs to.",
 			},
 			"interval_seconds": {
 				Type:        schema.TypeInt,